Replaceable valve-seat for flush-tanks.



W. C. DEMILT.

REPLACEABLE VALVE SEAT FOR FLUSH TANKS. APPLICATION FILED MAR. 15. l9l6- Patented Apr. 10, 1917.

. fry/aerator:

P imp WALLINGFORD C. DEMILT, 0F BROOKLYN, NEW YORK.

REPLACEABLE VALVE-SEAT FOR FLUSH-TANKS.

Application filed March 15, 1916.

State of New York, have invented certain new and useful Improvements in Replaceable V alve-Seat-s for F lush-Tanks, of which the following is a specification.

The object of my invention is to provide a removable valveseat, especially but not necessarily or solely limited to use in flushtank outlet-valves, adapted to be placed as a renewal seat on worn out flush valve-seat thimbles now in use, in a few moments, without breaking the pipe-connection, and which may by the hand, or by the use of a small wrench, or pair of pliers, be easily put into such operative position, and as quickly removed for the purpose of redressing or renewing.

In all flush-tank outlet-valves, especially in those wherein the moving-member is provided with a rubber-seating which abuts against a metallic valve-seat, in the course of a comparatively short time, through corrosion and the electrolytic action, the joint between them becomes more or less broken, and there is consequently a constant leakage. The positioning of the flush-tank is almost invariably such that it is troublesome to redress the valve-seat, or to remove and renew the same; mainly for the reason that the tanks are so small and so situated, and frequently in darkness, that the wrenches or other large sized tools necessary, can be used only awkwardly. The valve-seats on such tank siphon-valves at present in use, are

formed integral with and on the annular.

top of the outlet pipe-thimble which is screwed into the bottom of the tank and c0nnected below with the outlet-pipe. Consequently the thimble being in such a posit1on that it is almost impossible to redress the seating-face, while in position, in order to redress the valve-seat it is necessary to disconnect the outlet-pipe, take out the thimble, redress the valve-seat, and reinsert; or to place in position a new combined thimble and valve seat; all of which is an awkward and comparatively expensive operation.

My said invention is fully shown, described and claimed in the following specification, of which the accompanying drawing forms a part, wherein similar numerals of reference designate like or equivalent Specification of Letters Patent. i

Patented A'pr. to, 1917.

Serial No. 34,319.

parts throughout the several views, and in which I Figure 1 is a view in central longitudinal section of my improved removable valveseat in position on the outlet-pipe thimble 0f the flush tank, with the siphoning moving member of the valve in position thereon.

Fig. 2 is a detail top view of my improved removable valve-seat.

Fig. 8 is a side detail view in of such removable valve-seat; and Fig. 4 is a perspective view of a combined pipe-thimble of well known form in position on the floor of the tank, to which such removable valve-seat may be attached as a renewal.

Referring to the drawing The outlet-pipe-thimble shown has the upper surface of the top annular securing flange 1 flat or substantially so, and has extending upwardly therefrom the top-flange 2, forming as now used also its integral valve-seat, upon which the removable valveseat 3 fits securely, the abutting faces of 2 and 3 being preferably machined to a Water perspective tight joint. The reference numeral 4: designates such pipe-thimble, secured in the floor 5, of the tank by the screw threaded washernut 6, a gasket or gaskets 7, being inter posed between the top flange 1 and the floor of the tank, to make the joint water tight; and to the bottom of the thimble an outletpipe 8 is secured by a union screw joint 9, of the well known form.

My improved removable valve-seat 3 is usually and preferably of the shape and contour shown, comprising the rounded edged annular valve-seat face 10, the annular outer groove 11 (for sake of lightness) and the bottom flange 12, provided on the under annular surface with the gasket grooves 13,

between which surface and the upper face 2 of the annular top-flange 1 of the thimble, is interposed a gasket or gaskets 14 of any suitable compressible material, such as leather, rubber, etc., or annularly corrugated lead, copper, etc, to make the joint water tight; and the valve-seat 3 is also provided with the central female screw thread to receive the central siphon starting outlet pipe 16, whereby upon renewal of the valve-seat it is not necessary to renew such pipe 16.

The central orifice of the valve-seat ring 15 is provided with a screw-thread to receive the threaded lower end of the siphon starting outlet standard pipe 16, up and down over which reciprocates the moving siphoning member, comprising the inner pipe 17, upon which is concentrically supported the outer pipe 18, open at the bottom, andin free communication at the top with the pi e 17. Mountedupon the pipe 17 is the soft compressible valve-closing ring and gasket orwasher 20, usually 0 soft rubber fitting on the valve-seat 3; above which, to bring about quick closing action of the valve, is usually secured a heavy weight ring 21, of lead or other suitable material.

To start the siphon upon the raising of the valve closing ring or washer 20, upon the upward movement of the siphon composed of the pipes .18 and 17 and such washer, the water from the tank passes over .the annular top of the valve-seat, and into the pipe 16 by way of a plurality of slits or orifices 16 in the. wall thereof, which extend from a little below the top of the valve-seat 10, up to about substantially the top of the weight 21, as clearly indicated by dotted lines in Fig. 1; and the water passing therethrou h forms a liquid plunger in the pipe 8; and upon the dropping of the valve washer into the closed position shown in Fig. 1, the water in the tank is by the siphonic action thus brought about, drawn up between the inner face of the peripheral wall of the pipe 18, into the top of 17, and

. thence via pipe 16 into the pipe .8, and

thus all the water in the tank is'siphoned out, in the well-known manner until the siphon is broken at the bottom of'the pipe 18.

While not limiting myself to such securing means, a good and eificient one for removably securmg' the valve seat to the thimble, I have found to consist of three setscrews 22 passing through the base portion of such valve-seat, so as to.contact with the up er flange 2, which screws are equilateral y arranged around theperiphery of the valve-seat' and such set-screws may be of an desired form of point or head, but

I pre or them to have the heads of the wing thumb-nut form shown at 23, so that the same can be loosened and ti htened by hand without the use of tools. hile such setscrewsmay pass through the peripheral base of the valve-seat at any angle, in order to facilitate the operation of securing and removal'of the valve-seat, thesame are usually inclined downward as shown to facilitate grasping by the fingers; and in placing in position, the gasket 14 is put in place upon the flange 1 of the thimble 4; the valveseat is then placed in position and pressed firmly down so as to compress the washer 14 so as to make a water tight joint be,- tween the seat and thimble, and the setscrews forced inward to firmly hold the seat in place.

I claim:

1. A removable annular valve-seat pro vided with a set-screw or screws for securing the same upon an annular thimblc or member; such valve-seat being provided with a central female screw thread and havfor securinglthe same in position upon an annular thim 1e or member; such valve-seat .being provided with a central female screw thread; having annular gasket grooves in the base; also having an outer central annular peripheral groove; and an annular valveseat-face of rounded contour in cross-section.

WALLINGFORD C. DEMILT. Witnesses:

H. I. SIEGEL, 'H. D. PENNEY. 

